Remaining decisions aren't as pressing as where to put the library and likely will come near the end of his term or after he leaves the White House in mid-January 2017.
Obama says that's a good thing because "we still have a lot to do in these two years, and it's hard to do this and think about the next steps. I think the time will come when it will feel right to start thinking about what's next, but until now it's really about solidifying the work that we're doing here."
"You're president and first lady for eight years, not six years and five months," she said.
Some of the decision-making that lies ahead for the Obamas: Obama has said daughter Sasha "will have a big vote" in where the family ends up when his term ends, partly because the soon-to-be 14-year-old will still be in high school. (Big sister Malia is expected to be away at college.)
More From This Section
Some recent ex-presidents have their homes and libraries in the same city: George HW Bush (Houston) and George W. Bush (Dallas).
Obama spends Christmas in his native Hawaii, but it appears it won't be his home post-presidency. The White House said Obama was not behind the recent USD 8.7 million purchase of a Hawaii beachfront home by his friend, Chicago businessman Marty Nesbitt. Nesbitt is chairman of the Barack Obama Foundation, which is raising money to build the library.
Publishing houses will pay millions for the memoirs of the first black US president and first lady.
Both Obamas are already published authors. Obama wrote "Dreams from My Father," ''The Audacity of Hope" and "Of Thee I Sing," a children's book.
Michelle Obama is the author of "American Grown," about her garden on the South Lawn.